I do agree that interpersonal and technical skills do go and in hand or as a ratio of 50:50. Lacking in one of these can have drawbacks. Having really good technical skills and not being able to get it to your team when working as a team project would have a bad impact on the outcomes of the project. On the other hand lacking the necessary technical knowledge in your field of work would cause a lot of trouble to you and the people working with you. So having a both these skills within oneself is what would be expected of an individual in an industry.